CN106851680B - Method and device for optimizing pilot frequency cell measurement starting threshold - Google Patents
Method and device for optimizing pilot frequency cell measurement starting threshold Download PDFInfo
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- CN106851680B CN106851680B CN201510896896.0A CN201510896896A CN106851680B CN 106851680 B CN106851680 B CN 106851680B CN 201510896896 A CN201510896896 A CN 201510896896A CN 106851680 B CN106851680 B CN 106851680B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Abstract
The invention relates to the technical field of mobile communication, in particular to a method and a device for optimizing a pilot frequency cell measurement starting threshold, which are used for solving the technical problem that the pilot frequency cell measurement starting threshold can not be effectively configured in the prior art and comprise the following steps: the different frequency switching measurement report reported by all user equipment in a service cell is periodically collected; determining whether the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the currently acquired serving cell; after determining that the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, the current pilot frequency cell measurement starting threshold is increased by the set step value, so that the current pilot frequency cell measurement starting threshold can be dynamically adjusted according to the proportion of the user equipment for delaying the switching in the current environment.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a method and a device for optimizing a pilot frequency cell measurement starting threshold.
Background
In the case of a Long Term Evolution (LTE) system inter-frequency networking, if a User Equipment (UE) moves between inter-frequency cells, the UE needs to measure the inter-frequency cells to obtain the signal quality of the inter-frequency cells. The configuration parameters of the inter-frequency measurement need to be issued by the base station through a Radio Resource Control (RRC) reconfiguration message. The UE mainly carries out uninterrupted periodic measurement on the pilot frequency cell through measurement gap configuration in measurement configuration. When the pilot frequency is measured, the UE needs to interrupt the service of the current serving cell and then switch to other frequency points for measurement, so that the pilot frequency measurement affects communication and data transmission between the UE and the serving cell, and reduces the download rate of the UE.
Currently, in the LTE system, the same priority level pilot frequency is carried outWhen switching, the mode of A2+ A3 event is adopted. Event A2: when the level of the service cell is lower than the pilot frequency cell measurement starting threshold value, the pilot frequency measurement is triggered; event A3: when the level of the adjacent cell is higher than a certain relative value than that of the service cell, the pilot frequency switching is triggered. When the pilot frequency switching with the same priority is triggered, the condition Mn + Ofn + Ocn-Hys is met>Ms + Ofs + Ocs + Off. Suppose let Δ1If it is Ofs + Ocs + Off-Ofn-Ocn + Hys, the same priority different frequency switching condition is simplified to Mn-Ms>Δ1Wherein, Ms is a level value of the serving cell, a level value of the Mn target cell, and Ofn, Ocn, Hys, Ofs, Ocs, and Off are network optimization parameters configured on the network side.
In the prior art, when configuring the inter-frequency cell measurement starting threshold, the network optimization engineer mainly configures the inter-frequency cell measurement starting threshold manually according to experience. Therefore, the prior art has the following disadvantages in a manner of manually configuring the inter-frequency cell measurement starting threshold: the pilot frequency cell measurement starting threshold value is set inaccurately, is too large or too small through manual configuration, and if the pilot frequency cell measurement starting threshold value is set too large, the UE starts the pilot frequency measurement too early, so that the power consumption is increased and the UE downloading rate is influenced; if the threshold value for starting the inter-frequency cell measurement is too small, the UE may start the inter-frequency measurement too late, resulting in untimely handover and the UE may not occupy the cell with good service quality in time.
In summary, the prior art has a problem that the inter-frequency cell measurement starting threshold cannot be configured effectively.
Disclosure of Invention
The invention provides a method and a device for optimizing a pilot frequency cell measurement starting threshold, which are used for solving the technical problem that the pilot frequency cell measurement starting threshold cannot be effectively configured in the prior art.
In one aspect, an embodiment of the present invention provides a method for optimizing a pilot frequency cell measurement start threshold, including:
periodically collecting pilot frequency switching measurement reports reported by all user equipment in a service cell;
determining whether the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the service cell collected currently;
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, increasing the set step value of the current pilot frequency cell measurement starting threshold.
Optionally, after increasing the current inter-frequency cell measurement starting threshold by the set step value, the method further includes:
and returning to the step of determining whether the proportion of the user equipment delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the service cell collected currently.
Optionally, before periodically acquiring inter-frequency handover measurement reports reported by all user equipments in the serving cell, the method further includes:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
Optionally, the adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency handover measurement reports of the serving cell collected currently includes:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
Optionally, the adjusting the current inter-frequency cell measurement starting threshold of the serving cell according to the serving cell level value set includes:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
Optionally, the adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency handover measurement reports of the serving cell collected currently includes:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
Optionally, the determining whether the ue corresponding to the reported inter-frequency handover measurement report is a ue for delayed handover according to the following manner includes:
when the number of the user equipment in the service cell is larger than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is larger than a second threshold value, determining the difference value between the level value of the service cell and the level value of the target cell in each pilot frequency switching measurement report;
aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not less than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching; otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the normally switched user equipment.
Optionally, after determining whether the proportion of the user equipment delayed for handover corresponding to all the inter-frequency handover measurement reports is not less than a target threshold according to all the inter-frequency handover measurement reports of the currently acquired serving cell, the method further includes:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
In another aspect, an embodiment of the present invention provides an apparatus for optimizing a pilot frequency cell measurement start threshold, including:
the acquisition unit is used for periodically acquiring pilot frequency switching measurement reports reported by all user equipment in a service cell;
a determining unit, configured to determine whether a proportion of user equipment delayed for handover corresponding to all inter-frequency handover measurement reports is not less than a target threshold according to all inter-frequency handover measurement reports of the currently acquired serving cell;
a first adjusting unit, configured to increase the current pilot frequency cell measurement starting threshold by a set step value if the proportion of the user equipment delayed for handover corresponding to all pilot frequency handover measurement reports is not less than the target threshold.
Optionally, the first adjusting unit is further configured to:
and after the measurement starting threshold of the current pilot frequency cell is increased by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to all pilot frequency switching measurement reports is not less than a target threshold value according to all pilot frequency switching measurement reports of the currently acquired service cell.
Optionally, the apparatus further includes a second adjusting unit, specifically configured to:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
Optionally, the second adjusting unit is further configured to:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
Optionally, the second adjusting unit is further configured to:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
Optionally, the first adjusting unit is further configured to:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
Optionally, the determining unit is further configured to:
when the number of the user equipment in the service cell is larger than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is larger than a second threshold value, determining the difference value between the level value of the service cell and the level value of the target cell in each pilot frequency switching measurement report;
aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not less than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching; otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the normally switched user equipment.
Optionally, the first adjusting unit is further configured to:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
The method provided by the embodiment of the invention periodically collects the pilot frequency switching measurement reports reported by all user equipment in the service cell; determining whether the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the currently acquired serving cell; after determining that the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, the current pilot frequency cell measurement starting threshold is increased by the set step value, so that the current pilot frequency cell measurement starting threshold can be dynamically adjusted according to the proportion of the user equipment for delaying the switching in the current environment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart of an optimization method for a pilot frequency cell measurement starting threshold according to an embodiment of the present invention;
fig. 2 is a detailed flowchart of an embodiment of a method for optimizing a pilot frequency cell measurement start threshold according to the present invention;
fig. 3 is a detailed flowchart of a second embodiment of a method for optimizing a pilot frequency cell measurement start threshold according to the present invention;
fig. 4 is a schematic diagram of an apparatus for optimizing a pilot frequency cell measurement start threshold according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
As shown in fig. 1, a method for optimizing a pilot frequency cell measurement start threshold provided in an embodiment of the present invention includes:
102, determining whether the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the currently acquired serving cell;
and 103, if the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, increasing the measurement starting threshold of the current pilot frequency cell by a set step value.
When a user equipment is switched from a current serving cell to an adjacent target cell, a pilot frequency switching measurement report is generated, wherein information contained in the pilot frequency switching measurement report comprises a serving cell level value Ms measured by the user equipment, a target cell level value measured by the user equipment and the like.
In step 101, the serving cell periodically collects inter-frequency handover measurement reports reported by all the ues in the serving cell, where each measurement report at least includes a serving cell level value Ms measured by the ue and a level value of a target cell measured by the ue.
In step 102, the serving cell determines, according to all pilot frequency handover measurement reports of the serving cell collected currently, whether a proportion of user equipment for delayed handover corresponding to all pilot frequency handover measurement reports is not less than a target threshold, where the delayed handover refers to a relatively late time for the user equipment to handover from the serving cell to the target cell, and the reason for the delayed handover of the user equipment is that a pilot frequency cell measurement start threshold is set too small, and a time for the user equipment to start measuring a target cell frequency is relatively late, so that when the user equipment switches to the target cell, a level value of the target cell exceeds the serving cell very much. For example, in the normal case, when Δ1<Mn-Ms<Δ1+Δ2If the user equipment is switched from the serving cell to the target cell, the normal switching is performed, wherein delta1＝Ofs+Ocs+Off-Ofn-Ocn+Hys，Δ2The preset values are, for example, 0.5, 1, etc., Ms is the level value of the serving cell, the level value of the Mn target cell, Ofn, Ocn, Hys, Ofs, Ocs, and Off are network optimization parameters configured on the network side, Ofn is the specific frequency offset of the neighboring cell, Ocn is the specific cell offset of the neighboring cell, Hys is the hysteresis parameter, Ofs is the specific frequency offset of the serving cell, Ocs is the specific cell offset of the serving cell, and Off is the offset parameter of the a3 event. Wherein, the target cells are all adjacent cells; if the user equipment is switched from the serving cell to the target cell, the Mn-Ms is more than or equal to delta1+Δ2Then the user equipment is considered to have a delayed handover.
In step 103, since the delayed handover is caused by the current pilot frequency cell measurement starting threshold being too small, after determining that the proportion of the user equipments for delayed handover corresponding to all the pilot frequency handover measurement reports is not less than the target threshold, the current pilot frequency cell measurement starting threshold is increased by the set step value. For example, the target threshold value is 30%, when more than 30% of the ues in the serving cell have a delayed handover phenomenon, the measurement start threshold of the current pilot frequency cell needs to be increased, and a step value may be increased, for example, by 1dBm, 2dBm, 3dBm, or the like, which is determined according to actual needs.
The method provided by the embodiment of the invention periodically collects the pilot frequency switching measurement reports reported by all user equipment in the service cell; determining whether the proportion of the user equipment delayed for switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the currently acquired serving cell; after determining that the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, the current pilot frequency cell measurement starting threshold is increased by the set step value, so that the current pilot frequency cell measurement starting threshold can be dynamically adjusted according to the proportion of the user equipment for delaying the switching in the current environment.
In the step 102, as to how to determine whether the ue corresponding to the report of the inter-frequency handover measurement in the serving cell is the ue for the delayed handover, the embodiment of the present invention provides a manner, and in practical application, there are many other manners to determine, which depends on practical needs, and the present invention is not limited thereto.
Optionally, the determining whether the ue corresponding to the reported inter-frequency handover measurement report is a ue for delayed handover according to the following manner includes:
when the number of the user equipment in the service cell is larger than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is larger than a second threshold value, determining the difference value between the level value of the service cell and the level value of the target cell in each pilot frequency switching measurement report;
aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not less than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching; otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the normally switched user equipment.
The method first needs to ensure that the number of the ues is greater than the first threshold N1, the number of the inter-frequency handover measurement reports reported by all the ues is greater than the second threshold N2, and the specific values of the first threshold N1 and the second threshold are determined according to actual needs, such as N1 is 1000, N2 is 500, etc., so that the number of the ues is greater than the first threshold, and the number of the inter-frequency handover measurement reports reported by all the ues is greater than the second threshold, in order to ensure sufficient sample capacity, so that the result is more accurate, if the above conditions are met, then for one inter-frequency measurement report, it is determined whether the difference between the serving cell level value and the target cell level value in the inter-frequency handover measurement report is not less than the third threshold, if so, it is determined that the ue corresponding to the inter-frequency handover measurement report is a ue with delayed handover, otherwise, the UE is determined to be the user equipment of normal switching. For example, also explained in the above example, the third threshold value is Δ1+Δ2Wherein, is1＝Ofs+Ocs+Off-Ofn-Ocn+Hys，Δ2Is a predetermined value, e.g., 0.5, 1, etc., if Δ is satisfied1<Mn-Ms<Δ1+Δ2If the user equipment is switched from the serving cell to the target cell, the user equipment belongs to normal switching, namely the user equipment is the normally switched user equipment; if the condition that the user equipment is switched from the serving cell to the target cell is met, the Mn-Ms is more than or equal to delta1+Δ2Then, the ue is considered to have a delayed handover, i.e. the ue is a ue for delayed handover.
After the step 102, if it is determined that the proportion of the user equipments delayed for handover corresponding to all the inter-frequency handover measurement reports is smaller than the target threshold, the measurement start threshold of the current inter-frequency cell may be increased by one step value or two step values, or the increase may be stopped.
Optionally, after determining whether the proportion of the user equipment delayed for handover corresponding to all the inter-frequency handover measurement reports is not less than a target threshold according to all the inter-frequency handover measurement reports of the currently acquired serving cell, the method further includes:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
In the embodiment of the present invention, if the proportion of the user equipment for delayed handover corresponding to all the inter-frequency handover measurement reports is smaller than the target threshold, the adjustment of the current inter-frequency cell measurement starting threshold is stopped, that is, after the proportion of the user equipment for delayed handover corresponding to all the inter-frequency handover measurement reports is smaller than the target threshold, the current inter-frequency cell measurement starting threshold is used as the optimal inter-frequency cell measurement starting threshold. The method can determine the optimal pilot frequency cell measurement starting threshold, and is simple and easy to implement.
After the step 103, the increased inter-frequency cell measurement starting threshold may be used as a final inter-frequency cell measurement starting threshold, or it may be determined whether the serving cell still has a situation that the proportion of the user equipment that delays handover and corresponds to the inter-frequency handover measurement report is not less than a target threshold, if so, the inter-frequency cell measurement starting threshold is continuously increased, and how to do so may be determined according to actual needs, and the latter is taken as an example to be described below.
Optionally, after increasing the current inter-frequency cell measurement starting threshold by the set step value, the method further includes:
and returning to the step of determining whether the proportion of the user equipment delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the service cell collected currently.
According to the method, after the set step value is added to the pilot frequency cell measurement starting threshold, the step of determining whether the proportion of the user equipment for delaying the switching corresponding to all pilot frequency switching measurement reports is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently is returned, so that the method is a cyclic step.
The embodiment of the present invention first sets the pilot frequency cell measurement starting threshold to a relatively small value, so that a situation of delayed handover of a larger proportion of user equipments can be caused, and thus, based on the method provided by the embodiment of the present invention, the current pilot frequency cell measurement starting threshold is gradually increased until the user equipment of delayed handover falls below a preset proportion, which is the aforementioned target threshold.
Therefore, optionally, before periodically collecting inter-frequency handover measurement reports reported by all user equipments in the serving cell, the method further includes:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
In the method, before step 101, the current pilot frequency cell measurement starting threshold of the serving cell is adjusted to a relatively small value, so that the proportion of the user equipment for delaying the handover corresponding to all pilot frequency handover measurement reports is greater than the target threshold, and the subsequent gradual increase of the current pilot frequency cell measurement starting threshold can be realized until the user equipment for delaying the handover is reduced to below the preset proportion. For example, when the inter-frequency cell measurement starting threshold is 100 at most, the proportion of the user equipments delaying handover corresponding to all inter-frequency handover measurement reports may be made smaller than the target threshold. The current inter-frequency cell measurement starting threshold may be initially adjusted to be less than 100, for example, 10, 35, 50, 90, and the like, and then by determining whether the proportion of the user equipment that satisfies all the inter-frequency handover measurement reports and delays handover is smaller than a target threshold, if not, the current inter-frequency cell measurement starting threshold is gradually increased until the condition is satisfied, and at this time, the current inter-frequency cell measurement starting threshold is adjusted to be 100, or is slightly greater than 100, at this time, the current inter-frequency cell measurement starting threshold is stopped from being increased, and the current inter-frequency cell measurement starting threshold is used as the best value of the inter-frequency cell measurement starting threshold, where the value is 100, or is slightly greater than 100.
How to adjust the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency handover measurement reports of the currently acquired serving cell before step 101, that is, how to set the initial value of the pilot frequency cell measurement starting threshold, two ways are given in the present invention and are described separately.
In a first mode
Optionally, the adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency handover measurement reports of the serving cell collected currently includes:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
In the method, it is first required to satisfy that the number of ues in a serving cell is greater than a first threshold, and the number of inter-frequency handover measurement reports reported by all ues is greater than a second threshold, where the first threshold is N1 described above, and the second threshold is N2 described above, so that the number of ues is greater than the first threshold, and the number of inter-frequency handover measurement reports reported by all ues is greater than the second threshold, in order to ensure sufficient sample capacity, so that the result is more accurate, after the two conditions are satisfied, a serving cell level value set is determined according to the serving cell level values in all inter-frequency handover measurement reports in the serving cell, for example, currently, the serving cell collects 5 inter-frequency handover measurement reports, each measurement report includes a serving cell level value measured by a ue, respectively Ms1, Ms2, Ms3, Ms4, and Ms5, the serving cell may determine a serving cell level value set according to the 5 serving cell level values, that is, the set is { Ms1, Ms2, Ms3, Ms4, and Ms5}, and then adjust the current inter-frequency cell measurement start threshold of the serving cell according to the serving cell level value set. It should be noted that, the number of the inter-frequency handover measurement reports collected by the serving cell is 5 only for example, and in practical applications, the collected number is only required to be greater than the threshold N2.
Specifically, how to adjust the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set may depend on actual needs, for example, the maximum value is used as the current pilot frequency cell measurement starting threshold, that is, the maximum value is used as the initial value of the pilot frequency cell measurement starting threshold; or the second largest value is used as the current pilot frequency cell measurement starting threshold, that is, the second largest value is used as the initial value of the pilot frequency cell measurement starting threshold.
Optionally, the adjusting the current inter-frequency cell measurement starting threshold of the serving cell according to the serving cell level value set includes:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
The above method is further illustrated by the above example, the serving cell determines the set of serving cell level values as { Ms1, Ms2, Ms3, Ms4, Ms5}, for example, the predetermined ratio is 20%, the serving cell level values in the set are sorted in descending order, for example, into { Ms4, Ms5, Ms3, Ms1, Ms2} after sorting in descending order, then the first 20% of the serving cell level values are removed, that is, Ms4, Ms5 are removed, the generated first set is { Ms3, Ms1, Ms2}, then the current inter-frequency cell measurement start threshold of the serving cell is adjusted according to the maximum value in the first set, for example, the maximum value Ms 588 is further subtracted by a set value, and the current inter-frequency cell measurement start threshold is used as the current inter-frequency cell measurement start threshold, that is the inter-frequency cell measurement start threshold is slightly larger than the initial value { Ms 6, Ms1, Ms 27 } - Δ 686, wherein the serving cell level value is a certain ratio of the Ms 7370, so that the method is performed by removing the Δ score of the serving cell level values, the reason why the initial value of the inter-frequency cell measurement starting threshold is determined according to the maximum value in the first set is to ensure the stability of the sample, reduce the influence of the inter-frequency sample on the result of the method, because the finally determined optimal value of the inter-frequency cell measurement starting threshold is known to be in the vicinity of Ms3 according to practical experience, a set value Δ needs to be subtracted to ensure that the initial value of the inter-frequency cell measurement starting threshold is not greater than the optimal value of the inter-frequency cell measurement starting threshold.
In practical application, the initial value of the pilot frequency cell measurement starting threshold can be set to be slightly smaller than the optimal value of the pilot frequency cell measurement starting threshold, so that the determination of the optimal value of the pilot frequency cell measurement starting threshold can be ensured to be completed quickly, the system efficiency is improved, and resources are saved.
Mode two
Optionally, the adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency handover measurement reports of the serving cell collected currently includes:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
In the method, initially, firstly, the pilot frequency cell measurement starting threshold is randomly set to be a value, or a system automatically configures a value, and then the process opposite to the step 101 to 103 is carried out to adjust the set random value or the system value to meet the conditions: for example, the method first sets the pilot frequency cell measurement starting threshold to be 100, and when the proportion of the user equipment delayed for handover in the serving cell is not less than the target threshold, the pilot frequency cell measurement starting threshold is 80, the method of the present invention will reduce the pilot frequency cell measurement starting threshold until the pilot frequency cell measurement starting threshold is less than or equal to 80. The method is simple and reliable, has no requirement on the first setting value of the pilot frequency cell measurement starting threshold, and improves the system performance.
The method for optimizing the inter-frequency cell measurement starting threshold provided by the embodiment of the invention is described in detail below by respectively combining the method one and the method two.
Example one
As shown in fig. 2, a detailed flowchart of an embodiment of the method for optimizing a pilot frequency cell measurement start threshold according to the embodiment of the present invention is provided.
This step can ensure that the UE in the serving cell can always perform inter-frequency measurement, and this process can be completed manually or automatically by means of software or the like.
The step, when the number of UEs>N1, when the number of measurement reports is greater than N2, the level values Ms of the serving cells in all the inter-frequency handover measurement reports are counted to form a set X ═ { Ms1, Ms2, … …, Ms N }1，Ms2，Ms3，…，MskAnd (4) collecting X' which belongs to X, wherein N1 and N2 are preset values, α is a probability coefficient, the values can be set manually, and the recommended value is 0-5. MAX { Ms1，Ms2，Ms3…, Msk } is the maximum value of array X'; delta is the advance of starting pilot frequency measurement in the service cell, and the value can be set manually.
And step 204, collecting the pilot frequency switching measurement reports reported by all the UE in the service cell again.
If yes, it indicates that the current pilot frequency cell measurement starting threshold is set too small and needs to be increased, so go to step 206; otherwise, go to step 207. Wherein, Mn is the level value of the target cell; delta1Determined by serving cell inter-frequency handover parameters; delta2The level value of the target cell is larger than the allowable value of the service cell, the value can be set manually, β is a target threshold value, the value can be set manually, and the recommended value is 0-10%.
And step 206, increasing the pilot frequency cell measurement starting threshold of the service cell according to the set step value.
The step value is recommended to be 1-3 dBm.
Example two
A detailed description is given below to an embodiment two of the method for optimizing a pilot frequency cell measurement starting threshold according to the embodiment of the present invention, and as shown in fig. 3, a detailed flowchart is provided for the embodiment two of the method for optimizing a pilot frequency cell measurement starting threshold according to the embodiment of the present invention.
The step can be performed when the number of the UEs is>And N1, counting all the inter-frequency handover measurement reports when the number of the measurement reports is larger than N2. Wherein, Mn is the level value of the target cell; delta1Determined by serving cell inter-frequency handover parameters; delta2The level value of the target cell is larger than the allowable value of the service cell, the value can be set manually, β is a target threshold value, the value can be set manually, and the recommended value is 0-10%.
And step 303, reducing the pilot frequency cell measurement starting threshold of the service cell according to the set step value.
The value of the set step value is recommended to be 1-3 dBm.
The value of the set step value is recommended to be 1-3 dBm.
The step can be performed when the number of the UEs is>And N1, counting all the inter-frequency handover measurement reports when the number of the measurement reports is larger than N2. Wherein, Mn is the level value of the target cell; delta1Serving cell inter-frequency handover parametersDetermining the number; delta2The level value of the target cell is larger than the allowable value of the service cell, the value can be set manually, β is a target threshold value, the value can be set manually, and the recommended value is 0-10%.
Based on the same technical concept, the embodiment of the invention also provides an optimization device for the pilot frequency cell measurement starting threshold. The device for optimizing the pilot frequency cell measurement starting threshold provided by the embodiment of the invention is shown in fig. 4.
An acquisition unit 401, configured to periodically acquire inter-frequency handover measurement reports reported by all user equipments in a serving cell;
a determining unit 402, configured to determine, according to all pilot frequency handover measurement reports of the currently acquired serving cell, whether a proportion of user equipments delayed handover corresponding to all pilot frequency handover measurement reports is not less than a target threshold;
a first adjusting unit 403, configured to increase the measurement start threshold of the current inter-frequency cell by a set step value if the proportion of the user equipments delayed for handover corresponding to all inter-frequency handover measurement reports is not less than the target threshold.
Optionally, the first adjusting unit 403 is further configured to:
and after the measurement starting threshold of the current pilot frequency cell is increased by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to all pilot frequency switching measurement reports is not less than a target threshold value according to all pilot frequency switching measurement reports of the currently acquired service cell.
Optionally, the apparatus further includes a second adjusting unit 404, specifically configured to:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
Optionally, the second adjusting unit 404 is further configured to:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
Optionally, the second adjusting unit 404 is further configured to:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
Optionally, the first adjusting unit 403 is further configured to:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
Optionally, the determining unit 402 is further configured to:
when the number of the user equipment in the service cell is larger than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is larger than a second threshold value, determining the difference value between the level value of the service cell and the level value of the target cell in each pilot frequency switching measurement report;
aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not less than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching; otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the normally switched user equipment.
Optionally, the first adjusting unit 403 is further configured to:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A method for optimizing a pilot frequency cell measurement starting threshold is characterized by comprising the following steps:
periodically collecting pilot frequency switching measurement reports reported by all user equipment in a service cell;
according to all the pilot frequency switching measurement reports of the service cell collected currently, when the number of user equipment in the service cell is larger than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is larger than a second threshold value, determining the difference value between the level value of the service cell and the level value of a target cell in each pilot frequency switching measurement report; aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not smaller than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching, otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for normal switching; determining whether the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value;
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than the target threshold, increasing the set step value of the current pilot frequency cell measurement starting threshold.
2. The method of claim 1, wherein after increasing the current inter-frequency cell measurement starting threshold by the set step value, further comprising:
and returning to the step of determining whether the proportion of the user equipment delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value according to all the pilot frequency switching measurement reports of the service cell collected currently.
3. The method of claim 1, wherein before periodically collecting inter-frequency handover measurement reports reported by all ues in the serving cell, the method further comprises:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
4. The method as claimed in claim 3, wherein said adjusting the current inter-frequency cell measurement start threshold of the serving cell according to all the currently acquired inter-frequency handover measurement reports of the serving cell comprises:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
5. The method as claimed in claim 4, wherein said adjusting a current inter-frequency cell measurement start threshold of said serving cell according to said set of serving cell level values comprises:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
6. The method as claimed in claim 2, wherein said adjusting the current inter-frequency cell measurement start threshold of the serving cell according to all the currently acquired inter-frequency handover measurement reports of the serving cell comprises:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
7. The method according to any one of claims 1 to 6, wherein after determining whether the proportion of the user equipments delayed for handover corresponding to all the inter-frequency handover measurement reports is not less than a target threshold according to all the inter-frequency handover measurement reports of the currently acquired serving cell, the method further comprises:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
8. An apparatus for optimizing inter-frequency cell measurement start threshold, comprising:
the acquisition unit is used for periodically acquiring pilot frequency switching measurement reports reported by all user equipment in a service cell;
a determining unit, configured to determine, according to all inter-frequency handover measurement reports of the serving cell currently acquired, a difference between a serving cell level value and a target cell level value in each inter-frequency handover measurement report when the number of user equipment in the serving cell is greater than a first threshold and the number of inter-frequency handover measurement reports reported by all user equipment is greater than a second threshold; aiming at one pilot frequency switching measurement report in the service cell, judging whether the difference value between the level value of the service cell and the level value of the target cell in the pilot frequency switching measurement report is not smaller than a third threshold value, if so, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for delayed switching, otherwise, determining that the user equipment corresponding to the pilot frequency switching measurement report is the user equipment for normal switching; determining whether the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is not less than a target threshold value;
a first adjusting unit, configured to increase the current pilot frequency cell measurement starting threshold by a set step value if the proportion of the user equipment delayed for handover corresponding to all pilot frequency handover measurement reports is not less than the target threshold.
9. The apparatus of claim 8, wherein the first adjusting unit is further configured to:
and after the measurement starting threshold of the current pilot frequency cell is increased by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to all pilot frequency switching measurement reports is not less than a target threshold value according to all pilot frequency switching measurement reports of the currently acquired service cell.
10. The apparatus of claim 8, further comprising a second adjustment unit, specifically configured to:
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to all pilot frequency switching measurement reports of the currently acquired serving cell, so that the proportion of the user equipment delaying switching corresponding to all pilot frequency switching measurement reports is larger than the target threshold.
11. The apparatus of claim 10, wherein the second adjusting unit is further configured to:
when the number of the user equipment in the serving cell is greater than a first threshold value and the number of the pilot frequency switching measurement reports reported by all the user equipment is greater than a second threshold value, determining a serving cell level value set according to the serving cell level values in all the pilot frequency switching measurement reports in the serving cell;
and adjusting the current pilot frequency cell measurement starting threshold of the serving cell according to the serving cell level value set.
12. The apparatus of claim 11, wherein the second adjusting unit is further configured to:
sorting all the service cell level values in the service cell level value set in a descending order;
according to a preset proportion, removing the level of a part of service cells which are ranked at the top in the ordered service cell level value set to generate a first set;
and adjusting the current pilot frequency cell measurement starting threshold of the service cell according to the maximum value in the first set.
13. The apparatus of claim 9, wherein the first adjusting unit is further configured to:
determining whether the proportion of user equipment delayed for switching in the serving cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the serving cell collected currently;
if not, reducing the measurement starting threshold of the current pilot frequency cell by a set step value, returning to the step of determining whether the proportion of the user equipment for delaying the switching corresponding to the service cell is not less than the target threshold value according to all pilot frequency switching measurement reports of the service cell collected currently;
if yes, increasing the set step value of the measurement starting threshold of the current pilot frequency cell.
14. The apparatus of any of claims 8 to 13, wherein the first adjusting unit is further configured to:
and if the proportion of the user equipment for delaying the switching corresponding to all the pilot frequency switching measurement reports is smaller than the target threshold, stopping adjusting the measurement starting threshold of the current pilot frequency cell.
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| CN109982343B (en) * | 2017-12-27 | 2022-04-29 | 中国移动通信集团湖北有限公司 | Pilot frequency switching threshold value determination method, device, equipment and medium |
| CN109996257B (en) * | 2017-12-30 | 2022-01-25 | 中国移动通信集团湖北有限公司 | Pilot frequency start-up threshold optimization method, device, equipment and medium |
| WO2020211066A1 (en) * | 2019-04-19 | 2020-10-22 | Oppo广东移动通信有限公司 | Method for handover of network device, terminal device, and network device |
| CN112020107B (en) * | 2019-05-29 | 2022-08-23 | 中国移动通信集团安徽有限公司 | Method and device for optimizing pilot frequency switching start-up threshold and computing equipment |
| CN113709767A (en) * | 2020-05-22 | 2021-11-26 | 北京紫光展锐通信技术有限公司 | Pilot frequency measurement relaxation method and device, storage medium and terminal |
| CN114258061B (en) * | 2020-09-23 | 2023-06-13 | 紫光展锐(重庆)科技有限公司 | Method and device for reporting inter-frequency measurement, storage medium and terminal |
| CN112243278A (en) * | 2020-10-16 | 2021-01-19 | Oppo广东移动通信有限公司 | Cell search method, device, chip, mobile terminal and storage medium |
| CN117941417A (en) * | 2021-12-07 | 2024-04-26 | Oppo广东移动通信有限公司 | Method, device, equipment and storage medium for adjusting threshold in NTN |
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